Electric synchronous apparatus.



Patented lune I7, I902.

W. M. MINER.

ELECTRIC SYNCHRONDUS APPARATUS.

(Application filed July 25, 1901.)

(No Model.)

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UNITED STATES PATENT OFFICE.

\VILIJARD M. MINER, OF PLAINFIELD, NEW JERSEY.

ELECTRlC SYNCl-IRONOUS APPARATUS.

SPECIFICATION forming part of Letters Patent No. 702,454, dated June 17, 1902.

Application filed July 25, 1901. Serial No. 69,644. KNo model.)

To all whom it may concern.-

Be it known that I, WILLARD M. MINER, a citizen of the United States, and a resident of Plainfield, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Electric Synchronous Apparatus, of which the following is a specification.

My invention relates to synchronizing apparatus for telegraphic, telephonic, and other purposes, and more particularly to apparatus designed to operate in connection with an electric motor for keeping said motor running in synchronism with a distant appliance.

The object of my invention is to simplify the arrangements of apparatus heretofore employed for this purpose, to diminish the nu mber of separate generators which it is necessary to employ, to permit the use of motors having a large torque and operated by heavy currents, and to secure other advantages.

To these ends myinvention consists in the novel combinations of apparatus hereinafter set forth, and then specified in the claims.

In carrying out my invention the vibrator which I employ and which is made to follow the movements of the relay employed in the combination is kept in operation by an arrangement of devices such as is described in an application for patent filed by me of even date herewith Serial No. 69,643.

Referring to the'accompanying drawing, wherein I have shown diagrammatically a general arrangement of apparatus embodying my invention, 3 indicates a main line which includes the coils 2 of a polarized relay whose tongue 13 serves to bring the mag nets 4 4: of a vibrator alternately into action, so as to cause a vibrator-tongue 9 to vibrate in synchronism with the tongue 13 and with the reversals of current upon'the controllingline 3.

18 indicates electric supply-wires leading from any suitable source of electric power, and the magnets 4. are included in a circuit from one wire to the other, as may be readily traced in the diagram. From the junction of the two coils 4. a wire or connection is taken to the vibrating tongue 13, and the two opposite contact-stops of said tongue are also connected to the outside terminals of the magnet circuit, as shown. When the ton guo vibrates, it acts to alternately shunt the current of the supply-wires 18 from the magnets 4- in turn, so that they will be energized alternately and cause the tongue 9, which carries armatures for said magnets, to vibrate in synchronism with the tongue 13, all as de scribed in my eopending application for patent. Incandescent lamps 16 may be placed in shunt or branches around the contacts of the relay 13, as shown, to operate as sparkpreventing devices in the manner described in said application.

The fields of the motor which are to be run in synehronisni with the distant appliance are indicated by the numeral 7, while 6 indicates the armature of said motor. The fields '7 are maintained by current derived from the power-circuit 18 and are in a branch in multiple with that which supplies the vibratormagnets at. Suitable lamps 17 may be placed, as shown, to cut down the voltage of the current supplied from wires 18 and render the same suitable for operating magnets 4t and for energizing the fields of the motor.

The armature of the electric motor herein shown is wound after the manner described in the patent No. 428,222 and illustrated in Fig. l of said patent, and the circuit-wires which supply the reversed currents to said armature are indicated by the numeral 5.

The reversed currents required for synchronism are produced by a double battery or generator 10. Current from the two portions 10 is caused to flow alternately over the connection 5 in opposite directions by the action of the vibrator-tongue 9, which is a split tongue, as shown, the two halves of which control, respectively, the connections of the two batteries 10 with the circuit 5, placed as a shunt or branch to the two portions of the vibrator by making contact, respectively, with contact-stops connected also to said batteriesin the manner shown. hen the tongue 9 is against one contact-as, for instance, the left hand contaetcircuit may be readily traced from the lower of the two batteries or generators through connection 5 in the direction of the arrow 30 and back to the opposite pole of said battery through the tongue 9 and contact-stop. WVhen the tongue 9 is against the opposite contact, current passes from the upper of the two batteries 10 through connection 5 in the direction of the arrow 40. If the current thus flowing is a synchronizing as well as a power current for the motor, the energy supplied by the batte ries or generators must be considerable, and the sparking at the contacts of the circuit-changing vibrator will be so heavy as to produce liability to sticking. I obviate this difliculty and reduce the voltage of the batteries by giving to them the sole function of control and by providing the armature with an additional winding, which operates as a starting and a power winding combined and which may be supplied from the powercircuit 18 or from any other suitable source and in shunt with the operating-magnets of the vibrator. The commutator-brushes and commutator-cylinder of such additional winding are indicated by the numerals and 35, respectively. The windings of the armature connected to the commutator may be any suitable windings adapted to operate with continuous current and to produce a continuous torque of the armature. As shown, this continuous current or starting-winding is supplied in a branch in multiple with that which supplies the fields and the operatingmagnets 4; of the vibrator.

It is obvious thatinstead of using a doublewound armature, one winding for synchronizing and the other for power, a double armature might be employed. If desired, a suitable switch may be employed in the connection for the power winding or armature, whose commutator and brushes are indicated by the numerals 25 and 35. Such a switch is indicated at e5. Suitable liquid and plate condensers 11 and 12 may be placed in shunts around the contacts of the vibrator.

The connection of the circuit 5 as a branch or shunt around the two parts of the vibrator to secure reversals of current through a single armature-winding by the action of the vibrator, as herein described, is the subject of claims in my application for patent filed of even date herewith, Serial No. 69,642, and is only shown for the purpose of illustrating one of the arrangements of switching and circuit-changing appliances to which mypresent invention is applicable.

What I claim as my invention is- 1. The combination substantially as described with a synchronous motor, of a mainline relay in a synchroniZing-circuit, an electromagnetic vibrator having its operatingmagnets in circuits leading from a suitable electric-power circuit through the contacts of the relay, an armature-winding for the motor, two local batteries and connections from the same to the contacts of the vibrator adapted described to cause a reversal of current-flow in the armattire-winding by the action of said batteries alternately, and a separate armature-winding supplied from the electric-power circuit in multiple with the operating-magnets of the vibrator.

2. 'In a synchronizing apparatus for an electric motor, the combination substantially as described of a main-line relay, an electromagnetic vibrator, a power-circuit supplying energy to the vibrator magnets through the contacts of the relay, a synchronizing circuit on the motor-armature, a local battery or generator from which currents are made to flow alternately in opposite directions through the said synchronizing-winding by the action of the vibrator,an independent armature-circuit for the motor,a field-winding therefor and connectionsfor supplying saidindependent armature and field with current from the power wire in multiple with the operating-magnets of the vibrator.

3. In a synchronizing apparatus for an elcctric motor, the combination substantially as described of a main-line relay in the synchronizing-circuit, a vibrator having a number of operating-magnets brought into action alternately through the vibration of the relay, a synchronizing-circuit on the armature of the motor, two or more local generators or sections of generator connected alternately into the circuit of the armature over the contacts of the vibrator to cause reversals of ourrent-flow thereon, an independent powerwinding on the armature, an electric-power circuit supplying current continuously in the same direction to the commutator of said power-winding, and a field-magnet for the motor supplied in multiple with said armature power-winding from the power-circuit.

Signed at New York, in the county of New York and State of New York, this 26th day of June, A. D. 1901.

XVILLARD M. MINER.

Witnesses:

DELBER'r lI. DECKER, ETHEL L. LAWLER. 

